This paper reported the composition and distribution of volatile organic compounds （VOCs） in the ambient air of some typical chemical industrial park in Changzhou. The results showed that 58 VOCs were detected in the air of this chemical industrial park，including aromatic hydrocarbons，saturated hydrocarbons，halogenated hydrocarbons，olefins，aldehyde and ester compounds，et al. The main pollutants of VOCs were benzene，toluene，ethylbenzene，and xylene，the mass concentrations of which were in the range of 1.0~194 μg/m3. None of them were out of the limit values in reference standards. The total mass concentrations of the main VOCs at background and park sites were highest in autumn and winter，and the atmospheric VOCs of sensitive sites changed greatly with the seasonal variation. The annual average total concentrations of the main VOCs in park T1 and T2 were higher than those of sensitive sites，which were the lowest at background site. Besides the vehicle exhaust emission，the solvent volatilization and the pollutant emission in the production process increased the concentration of benzene series in atmosphere，at the same time the atmospheric quality at sensitive and background sites was affected.